{
  "manageEntity": {
    "action": "Save",
    "entityId": "531202683",
    "entityType": "Track",
    "nonce": "0x98a638992f0e41b7b423abcc9f7d7c92fee377b6611a0d7bf0f5eb501ac285b7",
    "signature": "0xd1af400e7d0a0b246a319eeeca11c91aa4c088b7c24a42aa4cc027f96634a8052d817809e1bc3fec6b3ac568e6df38c3068cf880c4d376b0effd97bdeddb03ec1b",
    "signer": "0x8dE158e9C0c94B92C252a15595F12c84d0AeA7a2",
    "userId": "342915357"
  }
}