{
  "manageEntity": {
    "action": "Save",
    "entityId": "2048714155",
    "entityType": "Track",
    "nonce": "1788700185204179812",
    "signature": "0x463f4f11b1a05969c64f8efe6460dd17e745e5b3c1c653da0a887ff6ecbfa3961e11dd39d79b85281f6bf4f60e38442faea7058db628d9b38db6444951b7373f1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}