{
  "manageEntity": {
    "action": "Save",
    "entityId": "112497543",
    "entityType": "Track",
    "nonce": "0xefe9cbc1fc2b798fd4ba44644f60e166572c599ed06802451065dca7750db85d",
    "signature": "0xb0193a179cd3dcae98b513f046c19b202788debb45ab60b454afd08fb9f8294d5a03fb87a8e0777c8631b832a9dc133bf58437ac55e5393ea66014648bbb05391c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}