{
  "manageEntity": {
    "action": "Save",
    "entityId": "476767677",
    "entityType": "Track",
    "nonce": "0xce8e77795b28332ba16136a301cac482da2c1fb26e41c5fb74cc77448fe47f79",
    "signature": "0x65ba1cb595c33ef9630db6deaa5d2df85c9aae94054e80af48de3112d040af89143d0efda82b7698285eefc5751ce600a14f468e51426d0d94020bce15d53c171c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}