{
  "manageEntity": {
    "action": "Save",
    "entityId": "240634274",
    "entityType": "Track",
    "nonce": "0x51b29b51b5539e6a3c75579ac2f08d0b35e09fe02ed43daed629b7a00f81892f",
    "signature": "0x7ea8d80f81de54b2cb324e35b2476f383011d4191c844bbaf0f813d695edc63e709b369f50c51d57024e5e7af0fbe14055c369b7651241dbd4803297fdf4c0b81c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}