{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885440312",
    "entityType": "Track",
    "nonce": "0xd6035768b24d26448570967bf110ad482b30ceb74e01d76d3d9ac10e91083547",
    "signature": "0xcf6a694f2b3157721f8f76f37111dbbe5024bd7705de22ebe58bfd826a3298a403078ef962a9041c5a7bbf2565b26cc17accea49be10cead17d4bec7c89d0d601b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}