{
  "manageEntity": {
    "action": "Save",
    "entityId": "217107785",
    "entityType": "Track",
    "nonce": "0xf6e4ee4d0e8815b930ed8216f7f1258e294a54205000fdd6d48b61062cc341a5",
    "signature": "0x9d92111cc8fcf589f571c5042b4173c7ae5edac18eae8bdf8beed344b7876e1870e4aadc8ef25970fc7b69df9d04a7bb9d192dcccd222c1a5d486fa338a553041b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}