{
  "manageEntity": {
    "action": "Save",
    "entityId": "427376185",
    "entityType": "Track",
    "nonce": "0xcf85de2ab8c0fa13a1fe1a21bdb9595e644b1811343b88606624df3a222b0995",
    "signature": "0x664f641d5a17b24a895c65b03a9b3ea2da16cdb7c373bb3e15dbb14cba2816cb2646e83d2b85fc5d0c9ff0c502fb9139ef89b68550b2f333797802fa1a21c5fb1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}