{
  "manageEntity": {
    "action": "Save",
    "entityId": "92631",
    "entityType": "Track",
    "nonce": "0x1b220b672a3dc9d54f262c602a106a19637b2c4b22a73cfeb65f1c990258417b",
    "signature": "0xcec88ac42255f39b36a046ba1e3bd063d35cf47e9ec8ac3a47531c24ec84ee8c7f50f036bc4749c9db346e07422ea892dca08c9cc3bc9ed61e3c0949f1d4d34b1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}