{
  "manageEntity": {
    "action": "Save",
    "entityId": "1099631094",
    "entityType": "Track",
    "nonce": "0x39389cf374c84e233a3d436ca706c19925570696e415d84a443c49819e221844",
    "signature": "0x81573eefc012b65dd338a77a4b370839ceee5b8493c8ffb4c83e9d5e8dfad9da262bd390289f51374562d5460ca4b7c1b274d8a3ae44f0136aa85f29f126166b1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}