{
  "manageEntity": {
    "action": "Save",
    "entityId": "1055253885",
    "entityType": "Track",
    "nonce": "0x83380ca4087c76023021b7af5f7cee05aa5b59047606ea237342fd7839e76cdf",
    "signature": "0xf9e9158de73595c43ceb3815e5f31a0c15e507e2264f4cc21ff74d063185705822c19eaf0351b4691107ea3d6514aaac7d5d2284ba47ec87e848fe36b18a30261c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}