{
  "manageEntity": {
    "action": "Save",
    "entityId": "921726034",
    "entityType": "Track",
    "nonce": "0x1a7c3567fac9b7a6cdef0665a619bf29328d69330ca5449ac15d8f49f4b5af9d",
    "signature": "0x014113c85de13491e52ba52c618bb487f8b2d84e3e338ba696a6f8effe8f994627454b1d474e33e49f96a2fbf5700e6787034be72647379c4b91d6c9bbee9db41b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}