{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047253",
    "entityType": "Track",
    "nonce": "0x4b03454a7ab9a8a1bb677044612459aa6475e9827c3783508d8327adcad98fd6",
    "signature": "0x1cf3e87348204c6a10d4d7d850189a1403ab9ce0db00172663194df32d5aacc171df97a06dc3bd26764885e8f4e444e5b5627407547146585af5c01ff7a18c3b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}