{
  "manageEntity": {
    "action": "Save",
    "entityId": "1731343243",
    "entityType": "Track",
    "nonce": "0xc9992af95b0e655a43a58572dffe9410a1dc60a5fe0a8507a8afa5c1b96fcb68",
    "signature": "0x509f335aca35b3595df9fce0d6642ffc4954f0a835cfe49e3c52582ca9d8ec1a7a1c86f9a9b69797dc92d9aa488daa70258e10644c2b128a03c5b2acd0c20e721b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}