{
  "manageEntity": {
    "action": "Save",
    "entityId": "320496480",
    "entityType": "Track",
    "nonce": "0x6d03032012f6ff9bd41f1b4eed19de17afba18a4966c1e030af7ba55bb2882ad",
    "signature": "0x23483d4b0df026f28fa2a0530818f7cc9cc4252d4fe5444593b0455a99c6868e47b32e54d87dc30404edac7b13768800d73dbee3c892ed8b99d275433f424b9f1c",
    "signer": "0x8dE618Aa8371041f23D771609990F5D2Ee1aDFDB",
    "userId": "688960593"
  }
}