{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996809432",
    "entityType": "Track",
    "nonce": "0x8ece19e8e68d1dde7e677e262de4b964a01989c07ce589bf84ebcbd222281520",
    "signature": "0x3a09ae1a1155809d200acbc1dc37c42c4477a8552579b526b8b7e8763abe28930077f1a33f4ae3912d221870a602a28abed5201688d5456f3b71e75d143f0d821b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}