{
  "manageEntity": {
    "action": "Save",
    "entityId": "51631",
    "entityType": "Track",
    "nonce": "1785857557647376889",
    "signature": "0xd09e462e031a92c8ae000c64cedf6b18f9ce1b0faa84d696c21d4d06379d0b6866e2c375e19d60d7a64e6184d159e167d9e525aa85a553eac86e57fc9e5e0ff91b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}