{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875451793",
    "entityType": "Track",
    "nonce": "0xb9c31bb7fb5c0f86646c1479d303f0633fd5d0c571eea2d2341bb178e3c40f07",
    "signature": "0x929a8f3b0fd9b35fe47027c06f7bd7e14ad2d7ca20c917fcc771de76ae127b4450b23dbbd1a1ea35eb4a55423cc6c3f0f9148a18fe177eff140d5bf4744203941c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}