{
  "manageEntity": {
    "action": "Save",
    "entityId": "243082417",
    "entityType": "Track",
    "nonce": "0x0b147a17f0e29119b17e4bb854e34b4f7d543655b6ffca04d8c6f0c16e28fc34",
    "signature": "0xea64e8dfae75b977a54d3089f1438312befa58ca477ef2b4b7f5cef44ead4880140c49b755bb226f473fd8e3439db86575a6f37cebbfd41a538a6a2dba5a83311c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}