{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220125195",
    "entityType": "Track",
    "nonce": "0xd445b0450e377fb7b01216bd90af109eb1cb4c0fa16e92be740cdbc4f29459de",
    "signature": "0x840b87c2760554ebfad82ae233eb3ee745df288dfff81b7e0f7f1e2c5afb1f443e11ab4d8559130cdc7ba4c253c41deae8de6c10a9301f5b11aae4bb7c4b7ad31c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}