{
  "manageEntity": {
    "action": "Save",
    "entityId": "838586",
    "entityType": "Track",
    "nonce": "0xc95b613fa094bbf9f2cbab172cac7563fd815cf8efc06f213ff8e163261018bd",
    "signature": "0xa831daa62641ea1fdd19e69765ce061a3d0e3b724cd415d9a907445c31e981272377f11a3fe0174c617b3d55640c5056088210602908f5cfa66b3948db11c1ed1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}