{
  "manageEntity": {
    "action": "Save",
    "entityId": "461304",
    "entityType": "Track",
    "nonce": "0xb1aab33dd027d2f03b0b4936ce046f482360c3dd4f935fae67bb5243cc2c90ac",
    "signature": "0x5f29ce6bd48f5b7f987d88e35b9f083467dc513401c8452f2816421ee2a2d4e92be82a402afa0607da693fee41580a8c2c3959dcb5ca11bc9074359826933e211b",
    "signer": "0x849b8180f084363b37768C823c174C9786020A66",
    "userId": "817339612"
  }
}