{
  "manageEntity": {
    "action": "Save",
    "entityId": "173305",
    "entityType": "Track",
    "nonce": "0xf1a331bf95d2d0996f3b0fc392481fb826ef58bdf76cbdeb473fe572e5221ed0",
    "signature": "0x94a0e57d20c5d9f857fe1b313c87a1d09e4e4fc120895e56f6c18b9af7b93b0b42be94d60642810b7e98b225b68c7c46410f5f0d7814390aaab75a5b888551781c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}