{
  "manageEntity": {
    "action": "Save",
    "entityId": "1193319641",
    "entityType": "Track",
    "nonce": "0xf12f70f370c411648007feb9551169ed02b714faf43b15ba6f2285df61e48c95",
    "signature": "0xb8459d6e3b672b7da02834dc8bbec20d4d337043732559c3b77401a2709ac3574957d8f2da7ac2cb5073e77139422f2c4480dff10a665f1bcf65e411d478ad891c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}