{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525568838",
    "entityType": "Track",
    "nonce": "0x51979d70ebd10ffd6653b419ab58d028d548aba8ff611395e9a40f2179814c80",
    "signature": "0x5c4f93b8f65774ff59c3ed3084bfc94159073f00a6bf6f263ea9951d5ab0e84c0f2ed2898c05e9854ced68a940002d6f1adec611fc047a2f5dd043cd9e868a841b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}