{
  "manageEntity": {
    "action": "Save",
    "entityId": "899936699",
    "entityType": "Track",
    "nonce": "0x702b67ec9404cd92ceeb57bedc91f5aa983b656fd5c3eabc0f778b8d194808ca",
    "signature": "0xf61245abc8e77a91ecdb07eb125594dc44386c598c30a58628f517f95e90202c60e425074783c8b6a4fb8d3d79e596ee7f5ed4effc55703d59b9dfe2496011ba1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}