{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835219748",
    "entityType": "Track",
    "nonce": "0x3f93debddbdc1774e71fb83111caea7312e029ce01671f38e1d5d9c8d96bf353",
    "signature": "0x6519f7471e5386e6dfdc92b07b67ab95ebd528d56a7253daa7de6f717aa6dc3d739b1db47d7325084b60579f6d102f39d26856c6b271649b9babe87c240554851c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}