{
  "manageEntity": {
    "action": "Save",
    "entityId": "713433072",
    "entityType": "Track",
    "nonce": "0x6389879d9e8d28a62cb97422138797bf77289580c11d33f55fc6295d2071e035",
    "signature": "0x6f513faca9ca44fb551bfa66722bfa1185d0e7b87afa5388b052e7da902ada531185fbf9fc6ef8c667964269fc739f56029047cc4d32475670bcf7523a69a18f1c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}