{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339418956",
    "entityType": "Track",
    "nonce": "1792355862117729245",
    "signature": "0x90221c7aba4b7065c5b56cd218c5852805714fa00e09e6e3e5157f0c8f16f333196dd70ff7ffa963935e23d4060c62b9f08e353c4f6f285a5b289025329535811c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}