{
  "manageEntity": {
    "action": "Save",
    "entityId": "103209",
    "entityType": "Track",
    "nonce": "0xaf7796d9d3a3d04f7506f698fc3081cb3e6c76361a70351f56619cc5b0684f03",
    "signature": "0x583257545cc07a0a0c7b291fcf54a42ffb9c5e73d9bc8dcc70acd478609068ee76fa9c845f675285001a823517b4d6e838413ddebf4ecb8639c476149b5ec3321c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}