{
  "manageEntity": {
    "action": "Save",
    "entityId": "1311346656",
    "entityType": "Track",
    "nonce": "0xf00bc0f5c6d96b4ac78d087f5e40f0ea8c6d50ebd5b47d4232959753e78b0d70",
    "signature": "0xf17c5c512b63aa3857d2949b064ed10bfcd6ff2208cbcba8bf524261288887e8109e9d2cc4e291ea18e55dac71efc198b7fd05a360e0cb2a8a27cb3dddff45641b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}