{
  "manageEntity": {
    "action": "Save",
    "entityId": "330801774",
    "entityType": "Track",
    "nonce": "0xb8930e783c766c3c35e6725bf063d499872fb69406f1d51c06b475eab8cad5bd",
    "signature": "0x83fb08509e4eede95784f6bb99b072a7748360e79d4fba50d8155813756ac61b68c19f1993d935c0585ec34a02fd1ae86fcc030c28c225fcd4fa14d9164d76831b",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}