{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662828366",
    "entityType": "Track",
    "nonce": "0x00fcf402c35014fab869242c7bf20f3704fe9e2161aa38c20308bd74b755d6f5",
    "signature": "0x5d93b09be277f0534523aab646a9bb6d58494dda5a09017c4119d8187c9d2f763177983f3367c526162b661a86d5a1d3d758653f3d5499fe4ec00cb1f70a5cd51b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}