{
  "manageEntity": {
    "action": "Save",
    "entityId": "1088408",
    "entityType": "Track",
    "nonce": "0x63f6dfa4abd3f46cdb0717a98e77e2b8e899d957cd074b7b4d3ff5cf644d4d2e",
    "signature": "0x88c00814a67050ff4d99b926db14bd8b16c69227ac9ad5b4bb27a5c92a3f330c1efd15a9f8edc52fcdab36670d057c67a2387dc737efedd496d8a5086e3a0d1a1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}