{
  "manageEntity": {
    "action": "Save",
    "entityId": "263336894",
    "entityType": "Track",
    "nonce": "0x99e32d8ef3e34c34ccd61be48b219ec4f907fbbccc4dd41b8a753a8acb576a4b",
    "signature": "0x55376e677beeb1be7e3aa6576553b6f8526527f7be9345bc3df38203ff8ac8ea45263de736620875aa13b3c0136b725adb84efd5c1482239ab43c9e8b10b36001c",
    "signer": "0x92d3aEA782A42D4B044a13a4727af9Aca3a0211F",
    "userId": "12615893"
  }
}