{
  "manageEntity": {
    "action": "Save",
    "entityId": "99152",
    "entityType": "Track",
    "nonce": "0x7149f29e1f58879637e19fb566f47676a6092f37a6f8eee5f540b280bfafba9e",
    "signature": "0x05f026225e087a537a6d385ffa08249a347f15698dedf29847d1c35a10c828ee50fdb52626d5259da461f9394bab91a803b909480f409458d8daa63a05e3cc251c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}