{
  "manageEntity": {
    "action": "Save",
    "entityId": "706400894",
    "entityType": "Track",
    "nonce": "0x77080db93c4804df591a27e1768e91fc3257b16c56a0df2449955278ccaedb09",
    "signature": "0x5a0722d393c24a9d67fa562abcb40321ac1e8d51c75bf6e77688aa2e4f5f6dba07b0f5fde7abd956686a14afa04e2409722c96f4275049d5d4b6c2103c16ebf31c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}