{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539065318",
    "entityType": "Track",
    "nonce": "0x2b47c873444b5276cb144c6de54022826459d2bbfbef138f5e23263da8293a06",
    "signature": "0x554d36485389ccb6e9111c3b2de982e67e2cfe1f1cbe29d63c6c5e182131723e6a16c9cfcab56f0cd67485dd7dfe131f670cce6627279b644c7f926a0a32166b1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}