{
  "manageEntity": {
    "action": "Save",
    "entityId": "1870248629",
    "entityType": "Track",
    "nonce": "0x9f8459fbec3d491d47b1644f4c88a858aa6ec1a104d2f2611bbe541f5717881f",
    "signature": "0xf25658e67efed312caff817028410b350076fc70558b5e3f61f8bcfaa5058a030029173e18d92fa10a2bee713eee4e3750ae4e57bb5cef7d8dbae365c34e734f1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}