{
  "manageEntity": {
    "action": "Save",
    "entityId": "919592028",
    "entityType": "Track",
    "nonce": "0x5eb8171ab9ced6935663ccc6262dbde5d44dbb0f360ba83dcc0c337dbda92313",
    "signature": "0xdb33fa0e91cb34e47e13e6bdf0c16b53398e8b6d276bcff25f184e08fa1b4f451cd51409fad0d4e63179d121afcf72290fc7413c6c26d5c62a63175028ce65401c",
    "signer": "0xA4B0C175920655a227577F59B8b7d134256B5386",
    "userId": "450369035"
  }
}