{
  "manageEntity": {
    "action": "Save",
    "entityId": "126690",
    "entityType": "Track",
    "nonce": "0xbbb41e1f5e5929de68e9556e0cb2f5c99104fb40859217811d17a768c3c001de",
    "signature": "0xc7af4e9efabfae7128c3f8e454c38add46cc33713adecd57df9dbecaa7f639c75780590abb52a7990ffc421e9ff03b8ea55b053661edc6918112815428398db91c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}