{
  "manageEntity": {
    "action": "Save",
    "entityId": "1917796654",
    "entityType": "Track",
    "nonce": "0x846535358753142be31b8ccbf52b7d77d8650d181586cc68ece1a11db331e3ba",
    "signature": "0x36ed8dde2efe61b08985191b4a5b3dc629339eae20c83779e3d043a124b2f2b7749f986f55f7936c2c89471885877c65488e8e471b5947c53630af80393921ad1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}