{
  "manageEntity": {
    "action": "Save",
    "entityId": "1589564338",
    "entityType": "Track",
    "nonce": "0x3af090a76bc2b6d160fb38ff30f6838ad1a6dd0b1a6cc59eec990a3ae525edd6",
    "signature": "0x5d00bfbeec2bbc39de6f815e55cd25f691f21beed3f31600c32d65ec8c3a924535352b3b870da2add7f7bbce5520378b6c8625133cfc53a8ef431db72eba69451c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}