{
  "manageEntity": {
    "action": "Save",
    "entityId": "51764827",
    "entityType": "Track",
    "nonce": "0xaaef6d156882208afe7f30fe8fce28b0b5b3d0092d60e8c91ec898325be39333",
    "signature": "0xb75ad308f0ffdb14334f33ec8fe4d036990cc20d44c6cfc862341c49f97bd1271bb6446e49f962bfc3a03a415bbeb2d028b0584c179f1cbc63849817247ab0c81c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}