{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249004944",
    "entityType": "Track",
    "nonce": "0x3f1b6a7281f6a8d5c335a93e195d67e3edeebb3a832602fe39ebdf4ff013c507",
    "signature": "0x700e2632432afcc502dae270b24d8b671dcd4c8daf209437b2c51327dbaa86b5674173b9804ccb7f48988d7ef0f81d06486d43d50a5361b322f8131ab991e2dc1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}