{
  "manageEntity": {
    "action": "Save",
    "entityId": "1184055688",
    "entityType": "Track",
    "nonce": "0x1f60c6a0927b4ee095f927ec068bd5f7d29c2d7004e98eb5059bbe6f8a0ae7e5",
    "signature": "0xae891aedc42f6bc2c01a53c8126c540e6db898395205cc3f2ba56a75aab4533017279fa7c4c8b44197ac222f46579e9276948619475e0d8f46937bee8268c5981c",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}