{
  "manageEntity": {
    "action": "Save",
    "entityId": "1845285359",
    "entityType": "Track",
    "nonce": "0xbdd2e8a395f069ed1ebd04756b3447d7659569e3cf85f0734a9d152b502efdb5",
    "signature": "0xa56a0c8039e6efd3369a376f7301bd0a6984ee22a1fcd79c7a0fc457fb8c0b1b570bf2d725edb193462224e0600c2da4e0bb0fbca236408640e93ca6cdfc1bc11b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}