{
  "manageEntity": {
    "action": "Save",
    "entityId": "171366687",
    "entityType": "Track",
    "nonce": "0xf7df3e0d337a281da860b086c39e0eed00d92d040b38f0d7ff652d4ba578b626",
    "signature": "0x386d835b5599d369f4a56bc4791b9a7b13832de5a911d6d095750c47db3a281e5020f6ad472fe2b97f27f77a95d52f65c1a83be3f81d4c86561ff223213eb5121b",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}