{
  "manageEntity": {
    "action": "Save",
    "entityId": "838835953",
    "entityType": "Track",
    "nonce": "0xa8e0852489c66337a05262edc448d6a9c02f5f00f6b21bb935a0bfbc89553413",
    "signature": "0x416d5b32d9e95f8f279527c2c3b4477be61fe03e3196196e86a931b942cdbd087ac65567a996133886cc5df4784a222f92d157714d3c87d27518da292c12c64c1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}