{
  "manageEntity": {
    "action": "Save",
    "entityId": "1556495270",
    "entityType": "Track",
    "nonce": "0x4920657bc859419a7f284bfdf9b6348a88ed70508137bd12c30a294ce0e9c256",
    "signature": "0x7aeeb743f47cd3239cfc2ab62c6a818e351719355e0c02d9b3487bc6054062a91a07ac8c0e40ae23aaf64c42db92b38f660b7af3f7209359a0b7428b143a52601b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}