{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123366726",
    "entityType": "Track",
    "nonce": "0x2fdce86315010c1d4a36fe2eb8988c05ae9d0f28014bbd25fb163f471a2b2292",
    "signature": "0xc26cfeee4bb163a2b0f865a049f1012d003b3219e2fded4dbe5f49c5dce089a656343e4a1525a0ace6dd9c22001ec99c2869d1fae7611915adebb483410811c11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}