{
  "manageEntity": {
    "action": "Save",
    "entityId": "194861",
    "entityType": "Track",
    "nonce": "0x4945053bdb63c5ac26d25a4b37777f0c0d518e754ac3e20467571db3f140e56f",
    "signature": "0x5c5c8529c5ab3d9e8f97f935ab7cf143535045515404efc2852380a2d17ed87f33f11f1ef0bcf106b1186ea0192c04ff6320093578d62d27a306a48ec414cbf41b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}