{
  "manageEntity": {
    "action": "Save",
    "entityId": "1018805918",
    "entityType": "Track",
    "nonce": "0x88ae07701a2c1946bb820f4bb1e467629ae83d8296f96ebe5365b985826b4a6c",
    "signature": "0xe3b466fe620a648b836b9193a04d91dc784adffdd02cbbeb80e09564372851027105f55508c577e6b04395d10c739fc06725c785c87cae2c44d4b97b58cddde21c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}