{
  "manageEntity": {
    "action": "Save",
    "entityId": "605396494",
    "entityType": "Track",
    "nonce": "0xe9c4486900469f0ccf316ed3448dde4d0106991424f22e3179a26d7fa2a68d8b",
    "signature": "0x8382acecdaac36af32056f2843cc382fc58a89386aba63e072d104bccb61e00d137525cfa85c09e1f0eeaf9d65f6a0671cbf72c7780118dd1698b24d6fdfcbbf1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}