{
  "manageEntity": {
    "action": "Save",
    "entityId": "296268601",
    "entityType": "Track",
    "nonce": "0x9ac9aeef54c206e74f28d3482e3ffc53e0ea678e6b02adb6adde63945385ace6",
    "signature": "0x4f09c0dcf66489cda49b4236f9fc6441ea0fcd5135e181cc7a51e7fbbf241c874a540d05016f0a28e0b60ced54d370d2d32df8b937825b786b056aa783d49a621c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}