{
  "manageEntity": {
    "action": "Save",
    "entityId": "227550730",
    "entityType": "Track",
    "nonce": "0xcfd545932f8c73fc6424ca248639c8b42e52ba49d07339ea91fe57f0afcbbc26",
    "signature": "0xd13e1698b4dfa37972ce804d09557381fc2cfbe50fbe2f814484c2e44ee015bd3d101f74e75163ff0a3b2b9de27b5e5068b873c6c9232cacc54f52195224fe171b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}