{
  "manageEntity": {
    "action": "Save",
    "entityId": "924564854",
    "entityType": "Track",
    "nonce": "0x30184b522dd462015460a98242b0c7b4c5541c6e48b2d322ce3c1461b04c40d4",
    "signature": "0x0ca8dced9440c70f37018e08fa19da5749b120521f85906d71cb80539495c2f7388198d3a63898e6a3212f71cded8eeafc5c272aa78eb4206d30f1aebfab54251b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}