{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345909016",
    "entityType": "Track",
    "nonce": "0x10759f99b308b5e15a9aa5f663510f1d6a97e2cfb104e0209029305186839d36",
    "signature": "0x4a528ab6499dcdedaef9e7f3916a59970b3d99986072038f194e999c6759dc5c641fb23f42a5b541b276a5bca4b6910c0b9ca561de49dd9d251395cbdb3f1b711c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}