{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981969447",
    "entityType": "Track",
    "nonce": "0xc2f9e82fcd285069f6d56776d7ffffc2ffa1cc43caacf777cf941406152507c3",
    "signature": "0xbf66525a71332d4cea05dd801cf2b0a12c82164eff4ea95f00fb9b295bc479622a9a3a02a6828eed7191463c0f2bdad6fee0fa3b0b934d7ab6ef4ff0be9808c51c",
    "signer": "0xc6A421843C183591853a72f2afe7AF4CcFbc4FA1",
    "userId": "344756485"
  }
}