{
  "manageEntity": {
    "action": "Save",
    "entityId": "3298370",
    "entityType": "Track",
    "nonce": "0x251cb2da5cc7c80171fca7eb2aaa75f5e446f94041a0274babe773ec4f44072c",
    "signature": "0x08a0d7b042560b971953951240a834e00e90c8ab87089bef092e582450034bfc7253baca34b08c98adcd89784c33aa012dea69ac76d1110c9e8455236bce517d1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}