{
  "manageEntity": {
    "action": "Save",
    "entityId": "550608",
    "entityType": "Track",
    "nonce": "0x6abc2d27021414efdb428e3284ae62c86fbebc60a1cc1aacab76f69e3eac71f6",
    "signature": "0x8410fac77e5768ff02a4eb6c749912c24431678e967a51479d6d7bb3725adad061d921834b64e6c15381a44a799ca6b4cb33b9b95f7d3561ab87884b2f68f3591c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}