{
  "manageEntity": {
    "action": "Save",
    "entityId": "126509846",
    "entityType": "Track",
    "nonce": "0xee5896a7ec3e7b4d45d6939ee1763ff9db99b55f02a0a79330d42f23e37706c8",
    "signature": "0xe9576c46d8ca1e6f8e473a962884613448e4236aa99a104b0662a39b309600b9186c1831fe49bf7da02589da64840f7820b43ab000bbec500c79476dd8dfe84d1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}