{
  "manageEntity": {
    "action": "Save",
    "entityId": "822143206",
    "entityType": "Track",
    "nonce": "0x18c51147b029d30fa669079bddb9ab178269cae8c3fe218989713ee809dee88e",
    "signature": "0x9bccdab89802345251f6c6648139da72a696d0fb0dcfb8f63cdfbe72baca4e43303bc1222efbea822936d6c29bf189b23ddd11c20f11f647042c46b7f5d7b6c51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}