{
  "manageEntity": {
    "action": "Save",
    "entityId": "800405693",
    "entityType": "Track",
    "nonce": "1792546580286142125",
    "signature": "0x567f2a38847f32b34cd35187921488733b0571b140dd8cc16090b7fe489790400ce25ea50c925ea5d5a7fbb43e22075d797fcf88ca88b8139f22ebf66e235f881b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}