{
  "manageEntity": {
    "action": "Save",
    "entityId": "405465733",
    "entityType": "Track",
    "nonce": "0xe7eb5ddc086ac0aa9862aecad3a1c4ec12863718d931029591fda1ac6a61856a",
    "signature": "0xf8fc370f4d763d8d9c206ac02d2de9a0f805529b00e7f843e30b46a5851fc7126eb1dd3ff1db9de0c283dd673e6d6a5ea241bd9cdb76bf2da8ff5dc7bb92b2151b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}