{
  "manageEntity": {
    "action": "Save",
    "entityId": "558352876",
    "entityType": "Track",
    "nonce": "0x9da32cdbc5ecac3d3a650eab65ee324b342ab25c775230ed3b95ab7fb9dc387d",
    "signature": "0xe0afbddedb4c1ebb7658db26e060230d4bb669ce75652adf173a17b8d3618a0814135d846a817cd6e3434abe1d36726f0b8c9bd2fc2adef0ff01653d664f2eb41c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}