{
  "manageEntity": {
    "action": "Save",
    "entityId": "817218561",
    "entityType": "Track",
    "nonce": "0xafc054771538f294037238a0f9085359b111f8a2eb8edba5a73c61110bff89fe",
    "signature": "0xdb1a61b12b82e4a5ba41ecdd35d9a4eb8c82da9ed55803b883ccf45abe65825509026a7519bb0273c166c80955ad8ec6746c42c2c549e410003f2988072509cb1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}