{
  "manageEntity": {
    "action": "Save",
    "entityId": "1550581938",
    "entityType": "Track",
    "nonce": "0x685f2722637f4dcca1203ab5e3572e5ab272fee388b3449c12a6b3484b1046e9",
    "signature": "0x704d560671042ccfecf6030244177e493ad8ad64f8eef0bb5443c616606f7fc1692004b97c2fde6bd00ab5a58135f1a8231a0a92b9d48ee78f6fdbc6f7cd2c8d1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}