{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990819150",
    "entityType": "Track",
    "nonce": "0x0c45757d8619e2987a51ee7e65642794020d673df9fb9258870d716474d6a6d8",
    "signature": "0x3918529ba5ed6cd868d2117d5edc93670bc436d87dd93648d7e80c8e5cfc716b06c3a59adde43197c93869ab9a1b98b844e4238aa13d7dc618c8d6d9eb2332091b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}