{
  "manageEntity": {
    "action": "Save",
    "entityId": "237630287",
    "entityType": "Track",
    "nonce": "0x6b3c3172676216fb9c1301b50ef41fe97a55503588a0cd01455ed0943fbb4184",
    "signature": "0x55d6e84fe6990097cbe99fcadfc1604933358323a298272fdb354c2824aa306b58aae7b070688060198a0b10acf1484d0c686ba778c88f877b51285bcda927ff1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}