{
  "manageEntity": {
    "action": "Save",
    "entityId": "355721968",
    "entityType": "Track",
    "nonce": "0x02ef16ad4f6679ce517b303e4130efac685ddd1c0138a2443bc5e88fbf0e7009",
    "signature": "0x9451ef64323a19ae8515c57b6750a11663d0582c2fca3878ab625a1aa8ccf58d244e717fe64ddca4201c5eac200218ca627dd37cefdc2ba88a9a0513c4d192221b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}