{
  "manageEntity": {
    "action": "Save",
    "entityId": "1344270249",
    "entityType": "Track",
    "nonce": "0xdf5fe9647cdc3412d62d5ac64350024130c36c4c67660fd07b8ea1f1d4f493e2",
    "signature": "0x25ba1af7812cbfab0f9345da9a6e5bff9ea849cb03e4711b416160029a34a2cb3e1ef51669fe143a4691c737b2fa3ec4f9994febddcab0e2ace67f86a101872b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}