{
  "manageEntity": {
    "action": "Save",
    "entityId": "1108506",
    "entityType": "Track",
    "nonce": "0x219c72882c3d55420dc8b448b09332a3ae8a33500240fcdfed83d762e5eeeea7",
    "signature": "0x55073517305ed09f734bec9d6c87be486c0a62d5371280dd043defbd7a25d38e6dfe06838fb4948d9936e01b61d0f0b56af1072c0452bf9ba7a3e3114074a8241b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}