{
  "manageEntity": {
    "action": "Save",
    "entityId": "1735633867",
    "entityType": "Track",
    "nonce": "0xd515b0f57bd175d59bb988fb2157231ed466fa9dbfbd866abb792dfc500dc1e9",
    "signature": "0xd1497ed9cf4b7647ad2c2728475fe227918ea245e0f793f868424e987adfe10b0892dbcc6a3fce6d017b1205451ea9f3d5acdd9352efea0970d2b41cde93aa261c",
    "signer": "0x1642AB480EAD0cea9776277347Cbd3e5Fe9889f6",
    "userId": "711757920"
  }
}