{
  "manageEntity": {
    "action": "Save",
    "entityId": "349621580",
    "entityType": "Track",
    "nonce": "0x0b29084fd33a372899f6ef425087654cc1425a565841617edea2904622592d1f",
    "signature": "0xb624bb4c2b22dea18dee20a51721fd28215eb6afd37cd03bc2bd2538f99052484c898333f22aaaee27b9a61d6c8f1e9a2c5efbadadbed69243b974f31de525ab1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}