{
  "manageEntity": {
    "action": "Save",
    "entityId": "972844836",
    "entityType": "Track",
    "nonce": "0x1ade59ecebd666e822aab78ae12a4e0a32d131d8ccb0c2b79094702b6b56a086",
    "signature": "0x8e485618b5523e0133283396fba83228530873c8661549c95584c5af1b8dec3906100b92d7deca8ca005d9099417478af9845339f8f484575dfc997457e1c4931c",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}