{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352803584",
    "entityType": "Track",
    "nonce": "0x667e4dc4febb69da111923afdb0dde253bb3a4fc7d218f3a45eddaae6caa58f2",
    "signature": "0xfedad5136408132113d856ed28abd0f2ed6dcd293ec6256e19f2fb1e9e522f4445f2135c67a4d67902655b852850c8657e84f9ac69fcd81485f67ccbdf89e5c51b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}