{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114346652",
    "entityType": "Track",
    "nonce": "0x9ad9e9371e90ee372424a3822cde4f30213fd92d8a90ec135a5c10b1f6fdccba",
    "signature": "0xfdfc68eaf45b157346a545b3a1cc8b568fb1ecb8ba61b0b11e8177d8108d78eb6743e0b9bfdc6f5c0996d80a9f93d756d0a6969525c432230b9877e0d54d6e871c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}