{
  "manageEntity": {
    "action": "Save",
    "entityId": "210279952",
    "entityType": "Track",
    "nonce": "0xda12c952786a9ed739c049939b5a335725c630cc745edafb544fe0d1f1513b45",
    "signature": "0xb65a08940cc07fc60b56473d88edae21ca717b19cfeb2a421ce09a5142b2f1fb6c27468f46f425dd4555ca25542c871b6018f1e610e5e03bc522839828b1b8461c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}