{
  "manageEntity": {
    "action": "Save",
    "entityId": "1957842009",
    "entityType": "Track",
    "nonce": "0x35fa63f22ef8e8ff3c86b0f91599a29bbe352629d50fc6c46d26fdbeb16b0a00",
    "signature": "0x8ed85c05486b569e40083e9d51cebb76b9d6323bf09dc04128748b2a915b1aa64f12d0007185ef83d42cac51fa4153c9b103063aeb39e20aaa387f8f4280c8bc1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}