{
  "manageEntity": {
    "action": "Save",
    "entityId": "956857320",
    "entityType": "Track",
    "nonce": "0x25cdffa940c4bcd1d5c47f81782f83a073a1e31a1ef62a011817db2d0756d9f9",
    "signature": "0xb42dfacaff20170cad6432c55c4fa8881f3bfdaa1fe82940834d705da29aad643595ebf64120b8328d3bb02603673ea58f3ce9059afb713eec808693a7cefa9a1c",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}