{
  "manageEntity": {
    "action": "Save",
    "entityId": "166331227",
    "entityType": "Track",
    "nonce": "0xcfd6a3f0aabb95140a51d8c44ddcebf91c1401a786b87112d4dad33df109207f",
    "signature": "0xfc68a52d1e4e9dc1c16d29d86bf808fcc5f5faf06d89b7a5516bb66c834d81805535aa10b83aeda95667be8715c9b059c9b345998670b92929e0ca5f83fa56e21c",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}