{
  "manageEntity": {
    "action": "Save",
    "entityId": "111707352",
    "entityType": "Track",
    "nonce": "1792419807632511140",
    "signature": "0x7b1678f71af5b794484f3618688c156794360c2191d7c0f9ad3684a60924b57035a69ad2995be8f5827c3064c68e4fd29d65c488d1c3a52c2d9cb4c0b8a9b0491c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}