{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016931242",
    "entityType": "Track",
    "nonce": "0x2743d8c1a80f372ea1ff52ed11ec85394a05b75eb36a6a739d642155eed4073e",
    "signature": "0xb61d016394023fb0c4e7e11622062d9f2c5b945e95fb3ce2c1959ea70cfd79ad2669b1729601a7ede79f7ec686b148078b49f43d0fdb387cc61943b4915e85cc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}