{
  "manageEntity": {
    "action": "Save",
    "entityId": "159893",
    "entityType": "Track",
    "nonce": "0xd67e8027b7f2c46d4cd36dae02b13f404495fdb7a1fe1d7b6054741b4b49f471",
    "signature": "0x390ca45492de605e37a3feb533e820315fc56f34da8032399159c491247899e35ce64d620794e120c7f8b3ccea6835a76e235367e6ba16f8dd910ee4c42709881c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}