{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801940744",
    "entityType": "Track",
    "nonce": "0xe0649dc4654dde2a65bd86b8e3a759868d0b0ca1e5c5aede36eb8572be25eb70",
    "signature": "0x5a5e7d08474c3e3a6d921b94c5cf2d56025a385c158ab1195443d1edd8d31546180a1edc5c1b72e89cb9d19a1c0a610c05353199382969bd74b4130edebdaab11c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}