{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021367",
    "entityType": "Track",
    "nonce": "0x039ca2b170c13756eec233ceb2a95668740a2b604b627bfe9e5492a31affe34c",
    "signature": "0xcd3c53ae35b4002997ce00e93cf1737041bc1425f7520552497e0f673d3a19ab3a63d2f765a6da3210a6f42a102e5b9d358b0801fa14511345b1f1e21bbc01391c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}