{
  "manageEntity": {
    "action": "Save",
    "entityId": "999546014",
    "entityType": "Track",
    "nonce": "0xc5b3d124e37b2642642a29acb677d89c274349a6a1af8920dff139089ae5f998",
    "signature": "0x0c27cfd16939923086991f61eb73eb93651062c7ffe30aeb4fa0e69dc9bd6aa53da8aa78191f6463e5c68b0cd4b88b349e936d612508254b9171091a003513e61b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}