{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118221764",
    "entityType": "Track",
    "nonce": "0xe2e3c12e7a95a17638cb6d8833ed9a8db366312ca45f2464e39b009b330d9713",
    "signature": "0x11b02bb7cc02a9c51d594fd41fda057f883fc9bb1c6eef94b1aef73e5063e3df203ee71b0e8db3cfa819e9334d29613442351776dd266f5432d6eda4c34b206b1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}