{
  "manageEntity": {
    "action": "Save",
    "entityId": "279054385",
    "entityType": "Track",
    "nonce": "0x3e8467229dcec204b814db20ea774d4e24f091128dc48a7267b73307479146a0",
    "signature": "0x7eab3a15f6ff44e56efcfc5238ffc0c935763d51642c2baa155be917fcc2405832dc5d27f77ac6e45b163fd355623980155e2818692cd4708cb7f774d1506ebb1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}