{
  "manageEntity": {
    "action": "Save",
    "entityId": "969409590",
    "entityType": "Track",
    "nonce": "0x307f062a7d20916db37110d00790b8d835ccc77b58ab04b5ab858f4a508ada6a",
    "signature": "0x206269f797554585abe0498715a702eb0041b4eb23c69e3d5f4b6b68f7d79200468b065793d1e55542d6e783d85dcff54ba768e1b55920cdbe708c041527166c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}