{
  "manageEntity": {
    "action": "Save",
    "entityId": "1665634014",
    "entityType": "Track",
    "nonce": "0xc0bc7ed5463ed9b900e1e6b331a73b56d0585b69626f48f843aac00c471bff5f",
    "signature": "0x6c7fd8a62f3030c7ee8b1ba27dd4801fef6e088567c6c93f106380842ce94ffc00def3f16c5d9926c4391612b62987c8401ea7e3a268bc0c56f9ca8b015086ee1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}