{
  "manageEntity": {
    "action": "Save",
    "entityId": "506363",
    "entityType": "Track",
    "nonce": "0x7c1cd532a7d8d905ae7df58f4a73f530525e2b8fa4e9ba94dddf35ef7510dbe9",
    "signature": "0x6b90d79eeb4d3556b07bda20d59e95240b27118413334b70124c91e69d3a9b6a6b9fd6413b7e9363ed286c5c0f0f137eb08a68a2283334b5325692ffd873a75a1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}