{
  "manageEntity": {
    "action": "Save",
    "entityId": "1523685081",
    "entityType": "Track",
    "nonce": "0x271307d53eecdc233c8479e518d347b7f3ffe18a7601319fab8770b157bb114e",
    "signature": "0xbbb62f9a1fe0ec85015fe0c3f76587a42111eae58f8cfd404ae54e66135b1140047674c7e52ea4b03399faf3fded483119705a8b20fc0d27c7733bb05269d76f1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}