{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000680560",
    "entityType": "Track",
    "nonce": "0x40592bfb6642db31eb3c87d7a815ad988a9eefa6d5b1a9d7332292c07e068ee7",
    "signature": "0x3b39b1377087bc260fb18f898f280e36d37083c683d70f6127e10e7a7ceb466c5650faeb2d5481ec4d55982870aa59468eb1425628e5a2538a1e22f89c184c6a1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}