{
  "manageEntity": {
    "action": "Save",
    "entityId": "1970880837",
    "entityType": "Track",
    "nonce": "0x03b34327c7f74c002c7ed79b039e35f791cd8e6205f6a155773f3a18d5cede7e",
    "signature": "0x02d11a2b41e04686d1c6d9a173813d625cda462e259f7cc97909a15b4ee91b18486bb984f1ca1c3833d5778550205c48b9da48b8b84ca41e5480068111f228da1b",
    "signer": "0x0e08C058dE1787206F03B99840c282498259E9C4",
    "userId": "589495545"
  }
}