{
  "manageEntity": {
    "action": "Save",
    "entityId": "214773",
    "entityType": "Track",
    "nonce": "0x4c9c9f295f3e7570116b37fd921684dd301fc9e76f4082f052a51ff8c4b1ae69",
    "signature": "0xe4c557269ec0d00ca4e1aff5cab4e58ee66a741007a8835e23531af347a244803d54619d58bb32b0f4c86d68377e6a28b625129c419bf81112d712843ffd14421b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}