{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019508288",
    "entityType": "Track",
    "nonce": "0xc9dd96076d613490c083387887a97378703443b163d42614dcfe4be5bc212ea3",
    "signature": "0xde7d07407c901fc7a2a3add267bdf3b7521fdb0d002221826df385ef56367a0e16f042469676116dbb67ce82aeefc8b03d4b5b8e8e7744ea04c57c090888732d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}