{
  "manageEntity": {
    "action": "Save",
    "entityId": "2135929189",
    "entityType": "Track",
    "nonce": "1786846679045244959",
    "signature": "0xa013d03d38432d88f08daf835485bf3228e50d50f7beac5c39d17df190e6d9c27d9965c7f5ac3e67ca12d742b267ce9770490232b0a103cfca8ed98709dc39901b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}