{
  "manageEntity": {
    "action": "Save",
    "entityId": "1761447376",
    "entityType": "Track",
    "nonce": "0x3cf7797c18d8ed68e158a76c19f99d0ad14ce49bd3e4e8ebfe427cb5949a396a",
    "signature": "0x7f35f5b20e4c0f9414684bf349cc7008cfb520a6f2ad08315dafe683dad2f0841b9834bcee3025d0ebd6741e0d35ced472a73faec1be718bbf5f6726e8b253641b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}