{
  "manageEntity": {
    "action": "Save",
    "entityId": "1627994557",
    "entityType": "Track",
    "nonce": "0x25cc9eadc50a4bc3782bfed5687297fb94a3f48e375a5cf54f3fa31f59aad4f2",
    "signature": "0x4c8d4ede80ffeaf060c22b18eb9ec0696e070db3bc853724a8422d1bfe7e7e2936888fd3fc70754c44fb50760754d61438cc0b04f58abc2367931b92a414a4b51c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}