{
  "manageEntity": {
    "action": "Save",
    "entityId": "806525251",
    "entityType": "Track",
    "nonce": "0xf9e4df0a879034eff8e32359e2cf48d9c96ee47ef4f048dc0f3c4c4b50ab8004",
    "signature": "0xacf230b5950c50456aed005bd3bf2044302e0147f06b8a631bbcf6feac26c2b641b0192c329a9b6d545202ddc8f674f5d393104d30a24af1d4aa7c46039be60f1c",
    "signer": "0x568426a5D555ADe94657d547B2Df4a4dc1f0C014",
    "userId": "71569007"
  }
}