{
  "manageEntity": {
    "action": "Save",
    "entityId": "702706524",
    "entityType": "Track",
    "nonce": "0xaeb42b13b6a8fa8fd749747d42099aacf6d4a9acfd7ef3ff9c21771fd4e52e36",
    "signature": "0xf71ae70d6bd3b0b1e8785d30405061046ca3d72dd3b5330a039750fc31f57ebc75cca9ba41e1c098366372dea98f2af6a57843e77bff787daaf4a8b44ec1cee91c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}