{
  "manageEntity": {
    "action": "Save",
    "entityId": "71597208",
    "entityType": "Track",
    "nonce": "0xd6f04aceac6149614cdc8b66ef1e91ae7369708dea150f434deba8cf44b4f8a8",
    "signature": "0xe29f78053f170afe76bc97bad2f64f4151a9d7f5eb96db750218770b5c0402a501712e347e7cf25f4ed024b6162535b70eb822d7069aa77a46b7d0f8373ce74b1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}