{
  "manageEntity": {
    "action": "Save",
    "entityId": "242997113",
    "entityType": "Track",
    "nonce": "0x15111e85b9d4eaef68f5417f6ac5659bda7e48ddbd62ec9b240ae11278d5a3e0",
    "signature": "0x5c761e78c01e875223e3b29cad1015a76e7cde7e301194b8197c9ff6def4255d17033e46703b30b7d8ca2218d8c6c4c2dd48bccafe300f478063ceef2281c4c31c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}