{
  "manageEntity": {
    "action": "Save",
    "entityId": "259942099",
    "entityType": "Track",
    "nonce": "0xc2957918cd802cc1cff1b458e5a18c0659c7e9a1c381383e8ac3147a7c514b6f",
    "signature": "0xe6ac2422125601d86cea80b943a5dc6dbfc4e42e6bcacb2c82662cca91520b4a1713b19500014a0c9a0c297d469389690d6b1b654d3a16fc0c1eac1b29651c6b1c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}