{
  "manageEntity": {
    "action": "Save",
    "entityId": "188613",
    "entityType": "Track",
    "nonce": "0x7a6e94b81dcd95addb8bc8f243d444a2a8f4e5b840def758e1dbe306b24ae8bc",
    "signature": "0xb1b717321fa4d16eb4002c110eb944f5d3a025ff06675e4fbaf45eddb477960f56dc15f8bb67d32dd96af9243b4907cbff5a1430dc5be72fa23e177d87817bae1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}