{
  "manageEntity": {
    "action": "Save",
    "entityId": "435201",
    "entityType": "Track",
    "nonce": "0x09223281a9948f05e936e21fe441259f52d1c5f38cc55aa03f64b81329bcc5bc",
    "signature": "0x2aedaeff4e18620cda9a08167d35984990486085be391fbb3f0535506a3249a768d3607cafca01ce1a3e5ab341337c69b148325593dd5a0835fe6c569ccd8bb11b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}