{
  "manageEntity": {
    "action": "Save",
    "entityId": "964941413",
    "entityType": "Track",
    "nonce": "0xb219d13b3066bd308ed0f3d06201de937b20b6131b7ffe732c52cdaabcee76ae",
    "signature": "0x0b9bb27d35d34747d4a58d4bb237474849962839e3af88b6deafc3bf045b9cd577d675d857b0a3a32ba9d7d3bb56d58e5fef3f843c668f78c3371e1ca445bf5d1c",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}