{
  "manageEntity": {
    "action": "Save",
    "entityId": "157592509",
    "entityType": "Track",
    "nonce": "0xefda8c0a3e05a764d2fd8a65a647dd0490f51022e4ed06a17ef048b20e191633",
    "signature": "0x36cf70cb4520a785b525162b243b777b105a16af6356719253e914b9c2e417a558f33005d5bd8616a88b1fd984344ee3bcc600010aa303e316fdf93576b0101a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}