{
  "manageEntity": {
    "action": "Save",
    "entityId": "511059379",
    "entityType": "Track",
    "nonce": "0x70e6037cc08ea0776c601f811a515551fa2e690b1692df4a8cef22878eba9be7",
    "signature": "0xd5a385dff5bbfb84a844dfc10d043d7a2aed1c473d3fdfae37a77b07e7d28aea7339745d4cdd30018dfedde457df6f90ef81ec3904432f0099d3ef04893363d81c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}