{
  "manageEntity": {
    "action": "Save",
    "entityId": "541255",
    "entityType": "Track",
    "nonce": "0x272ae12a12c0ab10a5afbaebad8951245a29474cdccbcf11c9f697024ec4d7f9",
    "signature": "0xa612f1e202d8bd5b7c212b138dfa4bc328e1ff7491584b175f7db2e69b19145d7a2512f8dff5e5baebd035b5f259fe4321820cf0f3f2ac448179c3593578547a1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}