{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975758319",
    "entityType": "Track",
    "nonce": "0xf1ede3d37f0213fdd1841747e99e71bcab749c8a5935b7ad71408345dd5cbca1",
    "signature": "0xd159531b9287ed9a0216665cb98715e93ed75f6c9a7ca039bd536ff2516de61c6180c37299bc628203c3a7545ed18b7e8952f497d739658f87935652fa4e47211c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}