{
  "manageEntity": {
    "action": "Save",
    "entityId": "230751098",
    "entityType": "Track",
    "nonce": "0xeefef64fe6fafd4b59a05b3e1a5321463a1730c5b7200ace67b44385116546c3",
    "signature": "0xeeeb242ee8d4c6f965d5b540e02fed6422e6b29aaa827c9f8eaa9f90967fd15a0e44bccea82093392357653b3997000893154297d4d5a037ff17b418298e85081c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}