{
  "manageEntity": {
    "action": "Save",
    "entityId": "1424988113",
    "entityType": "Track",
    "nonce": "0x2f3989e698fc7e5f982b2518b8d25f8306bc3cbcf7a61937f71d1a84b32656e3",
    "signature": "0x64716926bc28989491004c269c4767d85333f9b17ebab2cf4be31ea0eb7686ee67b5edb3dd15ec96256cb351d8a68e33fda9ae367251b6f769ce3912824ec9161c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}