{
  "manageEntity": {
    "action": "Save",
    "entityId": "760335888",
    "entityType": "Track",
    "nonce": "0x05a39b962b26eaaad4e7399ebce1a0f20040fc8a1970aed459e7765015cb300e",
    "signature": "0xb222ed16326c0bcc39c098c7254d10e4c84c5d67481f84187b7d4f86184496821c7704e70712a0558ccae3978418d626fefeca91743a1341865842f67b46bdf71b",
    "signer": "0xC7f1C5c105933bBdAC0c8A3219204f23AD4f3320",
    "userId": "381638009"
  }
}