{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594103165",
    "entityType": "Track",
    "nonce": "0x73b4f0a8dd682c60fb07c30a63f18b296b50398424830cbc0b0e99e9e7deb183",
    "signature": "0x4cce2009e1c0c33c2263468fcaf7d50e7c30f0ffde98de9a5980188b741072a060333c216e0341d79774d79377b717a6c293a7d5405f4c91336ba66d74d3afb31b",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}