{
  "manageEntity": {
    "action": "Save",
    "entityId": "2120780433",
    "entityType": "Track",
    "nonce": "0x438ab253aefd2e463e3c3f9735781ef5a37a8c4e6751e96a04775f6837008f96",
    "signature": "0xdf2b445b38b4b9802f78bc7ca1132410068d98a5b35fdfcf966d9dc008d775681df342deb2333f7bbbd0f4ebe8dde5604f86846e6b98c8e9fc92af744804e1c51c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}