{
  "manageEntity": {
    "action": "Save",
    "entityId": "1814503268",
    "entityType": "Track",
    "nonce": "0x8f61643a9885b339f688b0905152b7e0ca86275c3d5aa0253b85ab9987a7a8c6",
    "signature": "0x5ef10caac5bd521273fe8d00db509e936daa9baa66a4304d6202bd19570467b17129bf52950cdea74834e973e6e51b058c946ec388af6eb2158132dc3b565e491b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}