{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886644516",
    "entityType": "Track",
    "nonce": "0x91566ca5b5a2ebb5c7a0d27c5d0d5f5492ba262f5a52176b569e8829f0c35398",
    "signature": "0xde2269d1129982f1bc8c0485f7ec1b08a735621ccd521c5027c4a20116e227993fec63a6f7c8909bf3b5776b702ccf95f050e026f3c1f7aa9bb500f8280aeca91b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}