{
  "manageEntity": {
    "action": "Repost",
    "entityId": "639756",
    "entityType": "Track",
    "metadata": "{\"is_repost_of_repost\":false}",
    "nonce": "0x975438320fcab7f336c98d53385356b3eb00e3c8b9b7beaece73c6a50b6ed570",
    "signature": "0x3e27d341940f948f96e848855afaf7604d5f73025b0004330f53dc7a5c3e90a244de6a96f9037671f65002b74c2d431ef568bff704797fcd4de90e5baadbf2831b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}