{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087529150",
    "entityType": "Track",
    "nonce": "0x43c19aa21786b86cb3cc76c37aef9930b5c2aaadf007212496a8698a076c5520",
    "signature": "0xd3e5312fcef5b2f71c098bc0668ee37f27ba6deab79b9ba0ecbd60eb312b38bf7ea8b390d6c2ab3859b5b49d9570d4a800a8a98ecda5d6c0d2ca805a767f4db71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}