{
  "manageEntity": {
    "action": "Save",
    "entityId": "1234714035",
    "entityType": "Track",
    "nonce": "0xebf40de0442eaa9746fe3e754a3ed727726cd2695ca03bc04671854198cbc804",
    "signature": "0xb5abf8ffb3f35426413b0944f6314038d0cd3adad93162f6ed3a3d39a9a52da94f32f90bbdd615fe7a172f54c9775fd35f61a1dd907f43b90e245d607951bd811c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}