{
  "manageEntity": {
    "action": "Save",
    "entityId": "109090",
    "entityType": "Track",
    "nonce": "0x0f8c60c871ab5f5f29d6ff47224d41843310b302b0fcf9d46a1049ebe9ff8d36",
    "signature": "0xda111f41f4a82be0a7abada6e4159772e320f9c250ef471db80aef52a557545e0558ee9ea008d56c5f22e0eb4084bea876828c9ee18b1b77f7e3589aa75ed5d31c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}