{
  "manageEntity": {
    "action": "Save",
    "entityId": "763996",
    "entityType": "Track",
    "nonce": "0xe0df99f9740e998e30684630bb360cca244590491b1951bfbd3ae98da720973f",
    "signature": "0x3ac843ad3670fff0e8adfc7077601b9296524bc72f880a9600ea96f8871de1343604954c3b818a596b6f97cda6ce6808516c3edebfa85a4446a3d601fa866cc31b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}