{
  "manageEntity": {
    "action": "Save",
    "entityId": "954469",
    "entityType": "Track",
    "nonce": "0x799e67a306c08bb647d5a70775a014908f15484a6be5cc7bb1f9392b48e6c9c2",
    "signature": "0x97f383d34ca9ed16888ff14b9fcb2910346917746a84af1e892818a1fde849cd2112b67d983d8badf27c0881fc217544c13554162b5c83913a0df7a13b85e6841c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}