{
  "manageEntity": {
    "action": "Save",
    "entityId": "676493",
    "entityType": "Track",
    "nonce": "0x2e0ec7c183fef593549d438f11e071894bf7bbedabe666ae058d371e65519f25",
    "signature": "0x8d754acdb0576ec167c453e5a7222ce416331207bf51c41b6a2c6dfa80896d7170875341ee05e93a1d5e0b113cd2fb37036fa33e535649668df84c8cac8423dc1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}