{
  "manageEntity": {
    "action": "Save",
    "entityId": "467593037",
    "entityType": "Track",
    "nonce": "0x7e22e4b5f30bb5b3e244f2fd350f9f5d5e9a9e771d89b9887488a8b7e690b9d3",
    "signature": "0x2564460f13e0d8f4f0b47ed4cbc9e921ad288b4e2fd31bee9c04da3d5ff9d7395451ea96a56c0a58bc69cc33f09a08177bc32dc71a3d1c67f0d6f2760655b2681b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}