{
  "manageEntity": {
    "action": "Save",
    "entityId": "83213367",
    "entityType": "Track",
    "nonce": "0xa50c732961bcd1e9df8fea30f62c4d999f6cf65f5884e531d4e7c450c89189ff",
    "signature": "0xf863e68811bf09b86fc85526bcf208232c0f9dc7acf7eb5e18693c533a568de813c7c81f24a8379870525aed6f8701fe036c6e6a628b149923e24f1a4ac1d9081b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}