{
  "manageEntity": {
    "action": "Save",
    "entityId": "469878",
    "entityType": "Track",
    "nonce": "0xb7bcf57f90a74e1c0323c2b43bb86b72d133c4ce0b3ae4deba15a2712ec7cfbb",
    "signature": "0x61f6f44a87dbb0c3a6d0c11153a46ba1ea2312b3f1269dddd14c94da67c5e36414590accbbabce47247f3bafa4d73e5b2e156518818a0d92bbd9fb9447c99b5d1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}