{
  "manageEntity": {
    "action": "Save",
    "entityId": "131239",
    "entityType": "Track",
    "nonce": "0x566a57a0d9f4540434de0825b12fdc18764281844404545009c48f698208604b",
    "signature": "0x86094e6b866dd4d80d323447afcc6402a414912d6b44376f5461b0eaaf8632d531c966c86f42e083260e39eafe5dd734042a65b4674f7e1a1efd8ab8d866dc7f1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}