{
  "manageEntity": {
    "action": "Save",
    "entityId": "177198",
    "entityType": "Track",
    "nonce": "1792826511623170956",
    "signature": "0xbfeafc2b52abb5a925019f23464135ec3a895bfe2082a78b764779b9d036629a779345fba822c3f629938c8867c18d42439bcbe22d36bc6be9aebd4f4568b1e11b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}