{
  "manageEntity": {
    "action": "Save",
    "entityId": "81234",
    "entityType": "Track",
    "nonce": "0x9d2cf20f428faca1925f3a83bcf43dfe96245b192732cbbe21be2b52615eb877",
    "signature": "0xae79fdc9e1dd7c895a73e81047226d6a622b38fef2dd0c2e96318c07f7809c546e0e172f0be7ba6d7df5664153835cd44ca2776f59823ff88cb6ab0cce9cb7b21c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}