{
  "manageEntity": {
    "action": "Save",
    "entityId": "1447963678",
    "entityType": "Track",
    "nonce": "0x631f82de53ead0ca938b0869f78df9d843ac5f6bb117ff8f45e88af274c06160",
    "signature": "0xab0157075b707bf63dbe906376bbe22b6b632d135b4e2ec801a3b455a279a030441d41f9866f07281dec61857e81de87ec6fff4467fe67fc04003b4a1310c73a1c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}