{
  "manageEntity": {
    "action": "Save",
    "entityId": "1612461175",
    "entityType": "Track",
    "nonce": "0x6adf1049b5d04f0b333a4b5d50682bd9c80a6ec1d9c648fabb39fe607ae28caf",
    "signature": "0x1820b983bcad676c91d09a3601751d8360a9f45de0840e11aba2e4f75ce2c095323dab83edc729dce5af315674f132d9e72715ddcb20d09560f7e2c7722687641b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}