{
  "manageEntity": {
    "action": "Save",
    "entityId": "293903",
    "entityType": "Track",
    "nonce": "0x5a1b6e6f3f713ad2616b3e50a983f39ad7728bb56f1eb004f1b2f07b1073c96b",
    "signature": "0x270744292c8f6d0fecb2f36913386c01d8f2a80faf9c2c953b8a5028d37fb565047f76aee86b3eb9ddf05a5f08fa48afbd35de34cb798919bf163a1b40e277181b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}