{
  "manageEntity": {
    "action": "Save",
    "entityId": "292219448",
    "entityType": "Track",
    "nonce": "0x5c642f21c2393eda80faeb0b7d42b9cbca9ed2412ca5f19cbcec03a473b8b560",
    "signature": "0x2f76ec99cca31791fbf94f385899b57e3eff85a69d0045b50e92cebc7e0178f02ea95f694974de2d6aed5a03af0a32642dc2680784f418879deef6dc2f26867d1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}